diff --git a/app/assets/javascripts/discourse/app/controllers/basic-modal-body.js b/app/assets/javascripts/discourse/app/controllers/basic-modal-body.js
deleted file mode 100644
index 1638fd08930..00000000000
--- a/app/assets/javascripts/discourse/app/controllers/basic-modal-body.js
+++ /dev/null
@@ -1,6 +0,0 @@
-import Controller from "@ember/controller";
-import ModalFunctionality from "discourse/mixins/modal-functionality";
-
-export default Controller.extend(ModalFunctionality, {
-  modal: null,
-});
diff --git a/app/assets/javascripts/discourse/app/mixins/modal-functionality.js b/app/assets/javascripts/discourse/app/mixins/modal-functionality.js
deleted file mode 100644
index ee302c08fc1..00000000000
--- a/app/assets/javascripts/discourse/app/mixins/modal-functionality.js
+++ /dev/null
@@ -1,22 +0,0 @@
-import Mixin from "@ember/object/mixin";
-import showModal from "discourse/lib/show-modal";
-
-export default Mixin.create({
-  flash(text, messageClass) {
-    this.appEvents.trigger("modal-body:flash", { text, messageClass });
-  },
-
-  clearFlash() {
-    this.appEvents.trigger("modal-body:clearFlash");
-  },
-
-  showModal(...args) {
-    return showModal(...args);
-  },
-
-  actions: {
-    closeModal() {
-      this.modal.close();
-    },
-  },
-});